Conductive metal composition
View Patent ↗A conductive metal composition comprising 40 to 88 wt % of silver particles having an average particle size in the range of 10 to 100 nm and having an aspect ratio of 3 to 1:1, 2 to 20 wt % of a poly(2-ethyl-2-oxazoline) resin having a weight-average molar mass of 50,000 to 500,000 and 10 to 58 wt % of a solvent for the poly(2-ethyl-2-oxazoline) resin.
1. An electrically conductive metal composition comprising 40 to 88 wt % of the total composition of silver particles having an average particle size in the range of 10 to 100 nm and having an aspect ratio of 3 to 1:1, 2 to 20 wt % of the total composition of a poly(2-ethyl-2-oxazoline) resin having a weight-average molar mass of 50,000 to 500,000 and 10 to 58 wt % of the total composition of a solvent for the poly(2-ethyl-2-oxazoline) resin.
2. The conductive metal composition of claim 1 , wherein the silver particles are 65 to 80 wt % of the total composition.
3. The conductive metal composition of claim 1 , wherein the poly(2-ethyl-2-oxazoline) resin is 5 to 15 wt % of the total composition.
4. The conductive metal composition of claim 1 , wherein the poly(2-ethyl-2-oxazoline) resin has a weight-average molar mass of 50,000 to 200,000.
5. The conductive metal composition of claim 1 , wherein the solvent is 10 to 40 wt % of the total composition.
6. The conductive metal composition of claim 1 , wherein the solvent is selected from the group consisting of water, a mixture of water and one or more organic solvents, a single organic solvent and a mixture of two or more organic solvents.
7. The conductive metal composition of claim 1 comprising one or more additives.
8. The conductive metal composition of claim 1 consisting of 40 to 88 wt % of the total composition of silver particles having an average particle size in the range of 10 to 100 nm and having an aspect ratio of 3 to 1:1, 2 to 20 wt % of the total composition of a poly(2-ethyl-2-oxazoline) resin having a weight-average molar mass of 50.000 to 500.000, 10 to 58 wt % of the total composition of a solvent for the poly(2-ethyl-2-oxazoline) resin, and 0 to 2 wt % of the total composition of at least one additive, wherein the sum of the wt % totals 100 wt %.
9. A process for the production of a conductive metallization on a substrate comprising the steps:
(1) providing a substrate,
(2) applying a conductive metal composition of claim 1 on the substrate, and
(3) subjecting the conductive metal composition applied in step (2) to photonic sintering to form a conductive metallization on the substrate.
10. The process of claim 9 , wherein the substrate comprises one or more than one material.
11. The process of claim 9 , wherein the substrate is a temperature-sensitive substrate.
12. The process of claim 9 , wherein the conductive metal composition is applied by printing or pen-writing.
13. The process of claims 9 , wherein the applied conductive metal composition is dried prior to performing step (3).
14. The process of claim 9 , wherein step (3) is performed within ≦1 second.